Question

If iost 6 balls and i buy of box of 12 and lost 4 and now i have 18 how many there are begin with

Answer 1

Let's say you have
`b` balls at the beginning. Your steps are:

• You lose 6 balls:
  `b-6`
• You buy 12 balls:
  `b-6+12 = b+6`
• You lose 4 balls:
  `b+6-4 = b+2`

So, since you have 18 balls now, you have

`b+2 = 18 \iff b=16`

So, you had 16 balls to begin with.